exo: Implement wayland gamepad support

components/exo/gamepad_unittest.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "components/exo/gamepad.h"
+#include "components/exo/gamepad_delegate.h"
+#include "components/exo/test/exo_test_base.h"
+#include "device/gamepad/gamepad_test_helpers.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace exo {
+namespace {
+
+class MockGamepadDelegate : public GamepadDelegate {
+ public:
+  MockGamepadDelegate() {}
+
+  // Overridden from GamepadDelegate:
+  MOCK_METHOD1(OnGamepadDestroying, void(Gamepad*));
+

[reveman, 2016/06/29 21:55:45]

nit: remove blank line

[denniskempin, 2016/06/30 00:29:22]

Done.

+  MOCK_METHOD1(OnStateChange, void(bool));
+

[reveman, 2016/06/29 21:55:45]

nit: remove blank line

[denniskempin, 2016/06/30 00:29:22]

Done.

+  MOCK_METHOD2(OnAxis, void(int, double));
+  MOCK_METHOD3(OnButton, void(int, bool, double));
+  MOCK_METHOD0(OnFrame, void());
+};
+
+class GamepadTests : public testing::Test, public device::GamepadTestHelper {

[reveman, 2016/06/29 21:55:45]

s/GamepadTests/GamepadTest/

[denniskempin, 2016/06/30 00:29:22]

Done.

+ public:
+  GamepadTests() {}
+
+  void InitializeGamepad(MockGamepadDelegate* delegate) {
+    blink::WebGamepads initial_data;
+    mock_data_fetcher_ = new device::MockGamepadDataFetcher(initial_data);
+
+    gamepad_.reset(new Gamepad(
+        0, delegate,
+        std::unique_ptr<device::GamepadDataFetcher>(mock_data_fetcher_)));
+  }
+
+  void DestroyGamepad(MockGamepadDelegate* delegate) {
+    EXPECT_CALL(*delegate, OnGamepadDestroying(testing::_)).Times(1);
+    gamepad_.reset();
+  }
+
+  void SetDataAndWaitForDelegate(const blink::WebGamepads& new_data) {
+    mock_data_fetcher_->SetTestData(new_data);
+    // Wait for 2 polling cycles for data to be read and callbacks
+    // to be processed.
+    for (int i = 0; i < 1; ++i) {
+      mock_data_fetcher_->WaitForDataRead();
+      message_loop().RunUntilIdle();
+    }
+  }
+
+ protected:
+  std::unique_ptr<Gamepad> gamepad_;
+
+  // Pointer owned by the gamepad instance.
+  device::MockGamepadDataFetcher* mock_data_fetcher_;
+
+  DISALLOW_COPY_AND_ASSIGN(GamepadTests);
+};
+
+TEST_F(GamepadTests, ConnectDisconnect) {
+  MockGamepadDelegate delegate;
+  InitializeGamepad(&delegate);
+
+  // Gamepad connected

[reveman, 2016/06/29 21:55:45]

s/connected/connected./

[denniskempin, 2016/06/30 00:29:22]

Done.

+  EXPECT_CALL(delegate, OnStateChange(true)).Times(1);
+  blink::WebGamepads gamepad_connected;
+  gamepad_connected.length = 1;
+  gamepad_connected.items[0].connected = true;
+  gamepad_connected.items[0].timestamp = 1;
+  SetDataAndWaitForDelegate(gamepad_connected);
+
+  // Gamepad disconnected

[reveman, 2016/06/29 21:55:45]

ditto

[denniskempin, 2016/06/30 00:29:22]

Done.

+  blink::WebGamepads all_disconnected;
+  EXPECT_CALL(delegate, OnStateChange(false)).Times(1);
+  SetDataAndWaitForDelegate(all_disconnected);
+
+  DestroyGamepad(&delegate);
+}
+
+TEST_F(GamepadTests, AxisMove) {
+  MockGamepadDelegate delegate;
+  InitializeGamepad(&delegate);
+
+  blink::WebGamepads axis_moved;
+  axis_moved.length = 1;
+  axis_moved.items[0].connected = true;
+  axis_moved.items[0].timestamp = 1;
+  axis_moved.items[0].axesLength = 1;
+  axis_moved.items[0].axes[0] = 1.0;
+
+  // Gamepad connected

[reveman, 2016/06/29 21:55:45]

and here

[denniskempin, 2016/06/30 00:29:22]

Done.

+  EXPECT_CALL(delegate, OnStateChange(true)).Times(1);
+  EXPECT_CALL(delegate, OnAxis(0, 1.0)).Times(1);
+  EXPECT_CALL(delegate, OnFrame()).Times(1);
+  SetDataAndWaitForDelegate(axis_moved);
+
+  DestroyGamepad(&delegate);
+}
+
+}  // namespace
+}  // namespace exo